Wireless telephone.



PATENTED JUNE 18, 1907.

F. MOUARTY, DEO'D. n. A. MeGAETY, ADMINISTRATOR.

WIRELESS TELEPHONE.

APPLICATION FILED FEB. 12, 1906.

nnrrnn STATESQRAIENT OFFICE.

FRANCIS J. McCARTY, OF SAN FRANCISCO, CALIFORNIA; HENRY A. MOCARTY;

ADMINISTRATOR TO MoCARTY WIRELESS TELEPHONE NIA, A CORPORATION OF CALIFORNIA.

WIRELESS TELEPHONE.

Specification of Letters Patent.

OF SAID FRANCIS J. MoCARTY, DECEASED, ASSIGN OR FRANCISCO, CALIEOR 00., or SAN Batented Tune 18, 1907.

,Application filed February 12, 1906. Serial No. 300,639-

.Z'o alt whom, it may concern: I

Be it known that I, FRANCIS J. MoCARTY,

a citizen of the United States, residing at the city and countyof San Francisco and State 5 of California, have invented new and useful Improvements in 1 Wireless Telephones, of

which the followin 'is a specification.

My invention rel ates to a device by which telephonic messages may be transmitted 10 without the aid of wires or other mechanical intermediate connections between the stations..

It consists in a combination of devices whereby vibrations produced by vocal [5 sounds in the apparatus are capable of transmission throug the medium surrounding the earth Without the aid of Wires or'similar conncctions; and in the-construction of mechanism at the receiving end whereby such vibrao tions are made capable of actuating a receiving diaphragm.

Referring to the accompanying drawings,- Figure .1 is a diagrammatic view of the transmitting apparatus. Fig. 2 is a similar view of 5 thereceiving apparatus. 7

.A is a mouth-piece.

' 2 is a tube into the side of which the mouthpiece ens At one end of this tube is the microp one transmitter, as at 3, and at the o opposite end of the tube is the'transmitter diaphragm 4.

represents an induction or Ruhmkorff coil having two primary windings of wires 6 and 7, and in conjunction with these a secondary 5 insulated-winding as at 8. The first primary wire 6 is connected through a wire 6 and a binding post 9, point 10, which is adjustable in the non-conducting case within which the diaphragm 4 is y fixed, and this diaphragm-has"the' contact 11 corresponding with the contact 10. The contacts may be of platinum, Upon the opposite side of the diaphragm 4 is another contact20, and 21 is position to the contact 20.

6 is a wire or metallic connection between contact 21 and contact 10.

The points 20 and 21 are normally in contact and through the connections with the battery form a closed circuit, while the circuit'through thev contacts 10 and 11 is normally open. When a vibration of the diaspark to be with the contact screw or a contact supported in opshown by the arrow 19-, and thence to any phragm 4. takes place the circuit through contacts 21 and is broken by the outward movement of the diaphragrmand a circuit is established through the contacts 10 and 11.

In the operation of the device, words spoken into the mouth-piece will cause the vibration of both the diaphragmsS and 4.

The effect of these sonorousi vibrations on the diaphragm 4 is to cause it to make and break the. circuit in unison with the vocal sounds first between contacts 10 and 11, and then between 20 and 21. The effect of the sonorous vibrations on the microphone 3 is to vary the current in the second unison with the sonorous vibrations. The resultant eflect on the secondarycauses a The spark produced bears all the characteristics of the vocal or other sounds,'. thereby medium imparting wavesto the etherial which will be recorded'on a receiver tance.

- From the bindin post 9, the wire 6 connects with wire 6 or the coil, thence the wire 6 connects with the battery as at 12, thence to the binding post 13 of the transmitter 4.

14 is a condenser having wires connecting the binding-posts 93 and 13 with the priat a dis- -mary wire 6, and this serves to prevent sparking at the contacts of the transmitter.

The microphone transmitter 3 has the binding-posts 15 and 16 with which the ends of the second primary wire 7 are connected, with a battery interposed as at 17. I

In the operation of the device, words spoken into the mouth-pieceA will cause a v1bration of both the diaphra m 4 and that within the transmitter 3, and t e vibration of the microphone transmitter being synchronous with the vibrations of the diaphragm 4, the effect produced by the double primary winding of the coil 5 is transmitted through the secondary windin 8, and the discharge points 18, to the aeria conductor in the line suitable receiver.

I have found that any primary of a Ruhmkorfl' coil which has a second layer of wire wound over it serves to choke ofi theefiect of current inthe first primary on the secondary, if it-be suddenly short-circuited, and that by connecting an ordinary microphone transprimary in generated at the spark gap 18.-

' tensifying thevibrations from a transmitting devroefsaid means consisting of a transmitting diaphragm with metallic contact points nicrophon'e transmitter, and a batte upon opposite sides, and connecting means, an induction coil, local battery and COIUlQC-r tions there-through and with the coil, a spark gap interposed in the secondary circuit and a microphone transmitter.

2. In a tele hone, means introducedinto transmission devices comprising a double transmitter, said transmitter consisting of a mouth-piece, ajtransmitting diaphragm with metallic contacts upon opposite sides,

an induction coil and battery and connections withthe transmitter, (primary coils and a secondary coil energize thereby, means whereby a spark is produced, to transmit articulate speech.

3. In a wireless telephone, an induction coil'havin two primary'windings and a single secon ary winding, and two opposed transmitting diaphragms both operating synchronously, one of said diaphragms having contacts 11 on opposite sides, oneof said primary win ings being connected to each of said contacts and the other primary winding being connected to the other diaphragm, and said secondary winding-being energized by said primary winding, substantially as and for the purpose described.

i. In a wireless telephone, a mouth-piece, a transmitting diaphragm having contacts upon 0 posite sides and a conductor connecting sai contacts, a battery, an induction coil, wires connecting the coil and transmitter, a microphone transmitter, means whereby it is actuated in unison with the first named transmitter, and a second primary winding of the induction coil, said second winding being connected with the microphonic transmitter.

5. In a wireless telephone, a mouth-piece, a transmitting diaphragm with connected metanic contacts upon opposite'sides, an induction coil and battery and connections with the transmitter, a microphone transmitter .actuated in unison with the first named transmitter, a second primary winding of the induction coil connected with the interposed between said transmitter an connected primary winding of the coil.

the

6. Ina wireless telephone, a mouth-piece, a transmitting diaphragm with connected contacts upon opposite sides, a battery, an

induction coil, wires connecting the coil Land transmitter, a microphone transmitter,- means whereby it is actuated in unison with the first named transmitter, a second primary winding of the induction coil, said second winding being connected with the microphone transmitter, and a condenser interposed between the local battery and the first transmitter.

7. In a telephone, a mouth piece, a transmitting diaphragm with contacts upon opposite sides so disposed as to complete and interrupt circuits alternately when energized, an induction coil having two primary windings one of which has its terminals connectedto said contacts, and 'a second transmitter operating synchronously with the first named transmitter and connected with the other primary winding of said coil.

8. In a telephone, a mouth-piece, a transmitting diaphragm with contacts upon opposite sides disposed to alternately complete and interrupt circuits through each pair of contacts when energized, metallic connections between the exterior elements of said contacts, and induction coil having double primary windings, one of said windings being connected with both the diaphragm contacts,

and a second diaphragm operable synohronously-with the first-named diaphragm and connected with the other primary of said coil.

- 9. In a telephone, a mouth-piece, a transmitting diaphragm, with contactsupon opposite-sides disposed to alternately complete circuits through each pair of contacts when Y on,e,rgized,,an induction coil with double priniary windings, one of said windings being connected with both the diaphragm contacts, a microphone transmitter with which thr other primary winding is connected, at battery, and a chamber with which the mouthpiece connects between the transmitters.

10. In a telephone, means for intensifying the vibrations, said means comprising a chamber with which a mouth-piece is connected, a plurality of transmitters connected with the chamber, an induction coil with'double primary windings connected respectively with the transmitters, a secondary circuit energized thereby and connected with an aerial conductor, contactsupon opposite sides of one of. the transmitters, alternately energized and de-energized by the diaphragm vibrations, and connections between said contacts, and also with one of the primary windings.

- 11. In a telephone, a double transmitter, a plurality of primary coils connecting re sped tively with the two transmitting devices, contacts upon opposite sides of one of the transmitting diaphragms, connections between said contacts and with one of the primary coils, and a secondary coil.

12. In a telephone, an induction coil con- In testimony whereof I have hereunto set sisting of a plurality of primary'coils'and a my hand in presence of two subscribing Witi secondary coil, a double transmitter, (alter; .nesses. nately acting, contacts upon op osite si es 0 I r I one transmitting diaphragm, c(i nnections'be-' FRAA CIS MCCARTX tween said contacts and with one of the pri- Witnesses: s mary coils, and connections between the v S. H. NoURsE, other primary coil and the other transmitter. I D. B.- RICHARDS. 

